In this 1605 portrait by Frans Pourbus the Younger, Isabel Clara Eugenia wears a colorful saya similar to that worn in her portrait from around 1599.
From Wikimedia; posted as an upgrade on 1 July 2012.
This could be a copy of the preceding portrait, given the strong similarities of this and the dress seen in the previous image.
Keywords: 1605, Pourbus the Younger, Infanta Isabel Clara Eugenia, Princess, Spanish, Habsburg family, curly coiffure, high enclosing neckline, neck ruff, lace, jeweled headdress, framing headdress, draped necklace, earrings, jeweled crucifix, girdle, hanging sleeves, slashed sleeves, false sleeves, cuffs, tabbed sleeves, stomacher, revers, farthingale, vee waistline, saya, handkerchief